Litter box



FIG. 1 is a perspective view of the litter box of the present invention;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof; and,

FIG. 6 is a top plan view thereof. 

An ornamental design for a litter box, as shown and described. 